Southern Italy is poorer than northern Italy because the Catholic Church never conquered it. And that's not a hot take, that's what the data says. Part 2 of our deep dive into how the Western church's marriage bans accidentally created modern psychology, and why understanding WEIRD culture matters for everything from trade to testosterone to trust. Not "quirky." Not "unique." Statistically, measurably, scientifically WEIRD (Western, Educated, Industrialized, Rich, Democratic). In Part 1, we covered how banning cousin marriage broke down clans. Now we go deeper into what happened next: charter towns, guilds, impersonal markets, monogamy lowering testosterone, and how commerce created moral norms without anybody planning for it. The church reached down and grabbed men by the testicles (that's an actual Henrich quote). Monogamy domesticated wild males, gave them kids, lowered their T, gave them a stake in the future. Crime rates dropped 35%. Meanwhile in China's one-child policy: 38 million surplus males, crime rates rose 14% per year 18 years later. This is Henrich's answer to Guns, Germs, and Steel. What you'll learn: 🤝 why southern Italy has the Mafia (kinship vs society) 🌾 rice farming in Asia = collectivist = non-WEIRD 🇨🇳 how Communist China in 1950 banned the exact same things the church banned a millennium before 💪 monogamy as a testosterone suppression method 🏛️ charter towns, guilds, universities as kin group replacements 🤝 how markets created interpersonal trust with strangers 📍 every hour closer to a town market = 15 percentage point increase in cooperation scores 🔄 impersonal markets reduce in-group sociality, increase prosocial behavior with strangers ✉️ the Republic of Letters and Europe's collective brain ⚙️ James Watt didn't invent the steam engine from scratch, he added a condenser 📚 why Enlightenment thinkers were just standing on the shoulders of a great society 🧬 cultural evolution shaped our genes, then institutions shaped our psychology Timestamps: 0:00 Intro: Henrik Stays in His Lane 2:01 Breakdown starts here: Southern Italy & the Mafia 4:07 Rice Farming = Collectivist Asia 6:21 Communist China Banned Cousin Marriage 8:03 Monogamy vs Polygamy 10:58 Poor Samuel's Problem 15:16 Monogamy Lowers Testosterone 16:49 China's One-Child Policy: 38M Surplus Males 19:34 Commerce and Cooperation 27:38 Charter Towns & Individual Property Rights 29:04 Domesticating Competition 37:05 Market Mentalities: Time & Clocks 43:18 Trust & Fairness Experiments 48:30 Self-Concept & Mental States 55:52 Law, Science, and Religion 58:31 Afghanistan Democracy Quote 1:01:21 Protestantism: Super WEIRD 1:06:30 Birthing the Modern World 1:14:50 James Watt & the Steam Engine 1:18:47 Dark Matter of History 1:20:37 Henrik's Final Quote 1:22:32 Wrap-Up Last quote from Henrich that sums up the whole book: "The much heralded ideas of Western civilization like human rights, liberty, representative democracy and science aren't monuments to pure reason or logic, as so many assume. People didn't suddenly become rational during the enlightenment of the 17th and 18th centuries and then invent the modern world instead. These institutions represent cumulative cultural products born from a particular cultural psychology that traces their origins back over centuries through a cascade of causal chains involving wars, markets, and monks to a peculiar package of incest taboos, marriage prohibitions, and family prescriptions that developed in a radical religious sect, Western Christianity." Based on The WEIRDest People in the World by Joseph Henrich, this episode explores cultural psychology, human evolution, and how institutions shape our minds. Books Brothers Season 2: The Rise of States examines how states cities and civilizations emerged. Previous episodes covered the Ancient City, Secret of our Success, Against the Grain, Guns Germs and Steel, Origins of Political Order, and the Medici. 📚 book: The WEIRDest People in the World by Joseph Henrich (2020) 🎙 hosts: Andrew and JD let us know in the comments if you're weird or not weird
